/* Shared shell for live demo pages under /portfolio/... */

*, *::before, *::after { box-sizing: border-box; }

:root {
  --bg: #0f0d15;
  --bg-2: #17141f;
  --border: rgba(255, 255, 255, 0.08);
  --text: #f2f0f7;
  --text-muted: #a8a5b8;
  --text-faint: #6f6b80;
  --accent: #8b7cff;
  --accent-2: #b6a9ff;
  --success: #4ade80;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent-2); text-decoration: none; }
a:hover { color: var(--text); }

.demo-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  padding: 1rem 1.5rem;
  background: rgba(20, 18, 27, 0.65);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 10;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--text-muted);
  transition: color 0.15s ease-out;
}

.back-link:hover { color: var(--accent-2); }

.demo-title {
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: -0.005em;
}

.demo-main {
  max-width: 960px;
  margin: 0 auto;
  padding: 2rem 1.5rem 4rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.demo-intro {
  text-align: center;
  max-width: 640px;
}

.demo-intro h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 0.5rem;
}

.demo-intro p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 0;
}

.demo-stage {
  position: relative;
  width: 100%;
  max-width: 720px;
  aspect-ratio: 4 / 3;
  background: #000;
  border-radius: 12px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px -20px rgba(0, 0, 0, 0.6);
}

.demo-stage video,
.demo-stage canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.demo-stage .p5Canvas {
  width: 100% !important;
  height: 100% !important;
}

.demo-loading {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  color: var(--text-muted);
  font-size: 0.875rem;
  background: rgba(15, 13, 21, 0.85);
  backdrop-filter: blur(4px);
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.3s ease-out;
}

.demo-loading.hidden { opacity: 0; }

.spinner {
  width: 32px;
  height: 32px;
  border: 2.5px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.demo-note {
  font-size: 0.8rem;
  color: var(--text-faint);
  text-align: center;
  max-width: 560px;
  line-height: 1.5;
  margin: 0;
}

.demo-controls {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
  justify-content: center;
}

.demo-btn {
  padding: 0.6rem 1.25rem;
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text);
  background: var(--bg-2);
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  transition: all 0.15s ease-out;
}

.demo-btn:hover {
  border-color: var(--accent);
  background: rgba(139, 124, 255, 0.1);
}

.demo-btn.primary {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}

.demo-btn.primary:hover {
  background: var(--accent-2);
  border-color: var(--accent-2);
}

@media (prefers-reduced-motion: reduce) {
  .spinner { animation: none; }
}